What else does the timing advance temp guage effect?
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Fleet Mechanic
Joined: Oct 2012
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What else does the timing advance temp guage effect?
So I need to replace my timing advance/cold start sensor. It is still sending voltage to the plunger by the throttle even after the engine is at operating temp. For now I unplugged the plunger (easy to get at), is anything else effected by a faulty temp switch? Does it send voltage to anything else that would effect performance/mileage if I leave it as is for now?
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Fleet Mechanic
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Okay, thanks. I will unplug it there. It is in a van...hopefully I can reach it without removing the doghouse. What type of adverse effects would I see form the advanced IP timing? Does it advance it past the point of being helpful for performance?
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Fleet Mechanic
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Thats not good. I just replaced all 8 of mine. I'll make sure it's unplugged.
Post Fiend
Joined: Feb 2009
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From: Ottawa, Ontario
I think you can unplug it from the hood, but to re connect, you'll have to take the dog house off and go from the back.
Theres no room from the front to get to it properly to plug it back in.
Theres no room from the front to get to it properly to plug it back in.
Postmaster
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i disagree john. you can do it all from the front.
i played with mine quite a bit recently, and pulling wires on and off can easily be done by reaching around the thermostat housing.
for actually replacing the sensor, i used a 15/16" deep socket on 1/2 drive to remove it, and a 7/8" open end wrench to install it. it fits the 7/8 properly, but the larger socket makes for easier access around the thermostat housing. also, for installing it with the wrench, i loosened the air cleaner and slid it to the rear a few inches to get enough swing room for the wrench. its really pretty easy, just don't try to replace that sensor on a hot engine, as it does go into the coolant.
i played with mine quite a bit recently, and pulling wires on and off can easily be done by reaching around the thermostat housing.
for actually replacing the sensor, i used a 15/16" deep socket on 1/2 drive to remove it, and a 7/8" open end wrench to install it. it fits the 7/8 properly, but the larger socket makes for easier access around the thermostat housing. also, for installing it with the wrench, i loosened the air cleaner and slid it to the rear a few inches to get enough swing room for the wrench. its really pretty easy, just don't try to replace that sensor on a hot engine, as it does go into the coolant.
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Post Fiend
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Fleet Mechanic
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I was just looking at it. The cold air tube is in the way. If it wasn't there I could reach behind the T-stat housing and get to the plug. Could I just pull the 2 leads off the IP instead of pulling it off the temp sensor? It looks like the harness comes up and splits 3 different ways.....1 to the plunger for the throttle and 2 to the IP. That would be the easiest and only require me to remove the doghouse and air cleaner once (when the sensor arrives).......yes I can be lazy sometimes. If not, it looks like the front seat and doghouse are coming out tomorrow.
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yes, you can do it that way. my understanding of the wiring is as follows: the ONE wire entering this group goes directly to the fuel shutoff solenoid, but you notice two wires on that plug. the other goes back to the temp sensor, from which it goes to both the HPCA solenoid and the high idle speed solenoid.
therefore, unplugging those two components is equal to unplugging the sensor. i drove with mine unplugged for months before raiding a couple junkyard trucks for the sensors.
are you getting your sensor from the junkyard, dealership, or somewhere else that nobody knows about?
therefore, unplugging those two components is equal to unplugging the sensor. i drove with mine unplugged for months before raiding a couple junkyard trucks for the sensors.
are you getting your sensor from the junkyard, dealership, or somewhere else that nobody knows about?
Thread Starter
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Fleet Mechanic
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yes, you can do it that way. my understanding of the wiring is as follows: the ONE wire entering this group goes directly to the fuel shutoff solenoid, but you notice two wires on that plug. the other goes back to the temp sensor, from which it goes to both the HPCA solenoid and the high idle speed solenoid.
therefore, unplugging those two components is equal to unplugging the sensor. i drove with mine unplugged for months before raiding a couple junkyard trucks for the sensors.
are you getting your sensor from the junkyard, dealership, or somewhere else that nobody knows about?
therefore, unplugging those two components is equal to unplugging the sensor. i drove with mine unplugged for months before raiding a couple junkyard trucks for the sensors.
are you getting your sensor from the junkyard, dealership, or somewhere else that nobody knows about?
So to get rid of the cold advance, since my sensor is bad, I would unplug the single wire connector at the throttle plunger and the single wire connector that attaches further back on the IP. I would leave the 2 wire connector (towards the front of the IP) hooked up. If I took this one off it would not allow any fuel in and the van would not run.
Am I correct?
I found a thread on here that had a link to a place that sells them. I have not contacted them yet to see if they ares still avialable. If will try and find a god one at a junkyard or from a forum member.
Postmaster
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your statement is correct. and to clarify here, all connections here are "1 pin" connections, though some of those have 2 wires crimped together into the one connection. you may either unplug both the throttle plunger and the cold advance solenoid, OR unplug the temp sensor if you can reach it.
when i was first playing with mine, i unplugged things with the engine running, and quickly found out that the connection on the front of the pump is the fuel shutoff.
as for the place that might sell them, if they're still available it might be good to post a link here for anyone who searches and finds this thread later
when i was first playing with mine, i unplugged things with the engine running, and quickly found out that the connection on the front of the pump is the fuel shutoff.
as for the place that might sell them, if they're still available it might be good to post a link here for anyone who searches and finds this thread later
Thread Starter
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Fleet Mechanic
Joined: Oct 2012
Posts: 1,943
Likes: 21
your statement is correct. and to clarify here, all connections here are "1 pin" connections, though some of those have 2 wires crimped together into the one connection. you may either unplug both the throttle plunger and the cold advance solenoid, OR unplug the temp sensor if you can reach it.
when i was first playing with mine, i unplugged things with the engine running, and quickly found out that the connection on the front of the pump is the fuel shutoff.
as for the place that might sell them, if they're still available it might be good to post a link here for anyone who searches and finds this thread later
when i was first playing with mine, i unplugged things with the engine running, and quickly found out that the connection on the front of the pump is the fuel shutoff.
as for the place that might sell them, if they're still available it might be good to post a link here for anyone who searches and finds this thread later
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